今天讨论一下under这个简单的单词。
这个词表示位置的相对关系，一个物体在另外物体之下就是under，例如，The book is under your bed.
但用这个词还可以说很多不简单的话，表达一些不简单的含义。例如，
1 under attack 遭到攻击
The policy has been under public attack for many years.
2 under control 在控制之中
He put the class under control with ease.
3 under arrest 被逮捕
Put your hands behind your head. You're under arrest.
4 under construction 在建设中
Ten years have passed, the airport is still under construction.
5 under repair 修理中
My car is in the garage, under repair.
6 under pressure 背负压力
The Russian army was under great pressure when Hitler suddenly swung eastward.
7 under discussion 讨论中
His promotion is still under discussion.
......
阿加莎 克里斯蒂有本书《阳光下的罪恶》，Evil under the sun，其实说的就是“光天化日下的罪恶”。但under the sun 还有“世间万物”的含义，例如，
This is the best fruit I've ever eaten under the sun.
They chatted about everything under the sun.
光明磊落做事情我们说“摆在桌面上”，反之，做事情藏在桌子底下就是鬼鬼祟祟，见不得人的。
They closed the deal under the table.
The under-the-table arrangement enraged public opinion.
回到题目中的under the weather。其实它和天气没啥关系，它的意思就是“身体不舒服”。以后跟老板请假，别只会说 I'm ill了。可以换个说法：Sorry boss, I can't come today. I've been under the weather since last night 老板一定对你刮目相看。
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